53 



east of the Pacific region, and a report of results will no doubt be 

 appreciated at this time. 



Formulae for the California wash have varied considerably in 

 the literature of the subject, and as it is possible that conflicting- 

 statements concerning- its value may be due in part to these varia- 

 tions in composition, the following description of the wash used 

 during the winter in Illinois will have its value in this connection. 

 The mixture was made as follows : Fifteen pounds of stone lime 

 were slaked in a kettle over a fire ; fifteen pounds of sulphur were 

 sifted or stirred in as the lime was slaking, these materials being 

 boiled vigorously until the lime and sulphur were entirely dissolved 

 — usually something over an hour ; and fifteen pounds of salt were 

 then put in and the whole was boiled a quarter of an hour longer. 

 Enough hot water was added to make fifty gallons, and the mix- 

 ture was sprayed while warm through a no^vzle with a large cap 

 for a coarse spray. When the material first dried on the tree it 

 gave the bark a saffron-yellow color, which changed in twenty- 

 four hours to a dull green and then gradually faded to a greenish 

 gray. 



The CaUfo7-nui Wash at Siinwicrfield. — No. 1. One hundred 

 and forty-five peach-, plum-, and pear-trees sprayed on the place of 

 Wm. Hagemann between March 29 and April 2. Practically all of 

 these trees were badly infested with the scale. On the 29th of 

 March the weather was clear at first, with the temperature rang- 

 ing from 48 to 66 degrees, but a hard rain fell in the afternoon 

 with a light northwest wind. From March 31 to April 2 the 

 weather was continuously cloudy but there was no rain; the wind, 

 northwest and west, from brisk to high; and the temperature ranged 

 from 36 to 62 degrees. 



August 16 several peach- and pear-trees were examined on this 

 place and one thousand scales were carefully examined, pains be- 

 ing taken, as in all other cases on this trip, to select the scales 

 from all parts of the tree. Not a living scale was found on this 

 place. 



No. 2. Twenty-three slightly infested peach-trees sprayed 

 March 22 and 24 in the orchard of Messrs. B. and A. Baer. The 

 weather was clear on the first of these days but cloudy the second, 

 the temperature ranging from 42 to 72 degrees. August 16 no 

 living scales could be found. 



No. 3. Twenty-four badly infested peach-trees belonging to 

 Mrs. Mary Reibold treated the 15th and 18th of March, the first 

 day cloudy throughout with a temperature ranging from 54 to 62 

 degrees, the wind at first south, changing to northwest at four 



